“The furthest I’ve ever run is 8 kilometres, and the Sydney Harbour is a 10, so I’ve had to motivate myself to get into this type of training, set goals and get ready for the event, which is very exciting,” says Falkiner, who admits injecting a new form of exercise into her program has come with its challenges.

“I like HIIT, yoga and swimming usually. A lot of people are natural born runners, but for me personally running hasn’t been something I’ve done a lot of. Every body type is different, and responds to different workout plans.

“The difference with something like running is that you have to get into the mindset that what you’re doing is for longer, so it’s important you set yourself up for success. That can be as simple as finding the right music to keep you going, and getting yourself into the right headspace to push through,” says the fitness enthusiast who, famously, dropped 30kgs on the first season of Biggest Loser, and has since become a pin-up for healthy living and maintaining a balanced lifestyle.

Key to that, she says, is constantly challenging yourself.

“Never be scared to push yourself outside your limits,” when it comes to fitness, because, as Falkiner has found in her running training, most of these limits are self-imposed.

“If you get to a point where you need to stop and recover and walk – that’s fine! I’m not going to be the fittest person running the event, but it’ll be a fantastic experience – and in any fun run the atmosphere is great. Ultimately, everyone is there to have a great time, and anyone who participates will be proud of themselves for having a go,” she says.

In terms of the practical side of training, Falkiner’s workout regime will involve group training, running classes, sessions with a personal trainer and interval training – especially sprints, which she says, “I love.”

When it comes to fuelling herself for the event, Falkiner’s diet plan won’t change much, as she generally sticks to a diet rich in wholefoods and organic produce, with the correct portions of protein, fresh vegetables and restricting her intake of refined carbs.

And, while all components of training seem reasonably attainable, if you feel intimidated by the prospect of a longer run, Falkiner advises starting with the 5km course if 10 kilometres in one day seems all too intimating, and some positive self-talk – “don’t be afraid to try something different, because in the end, it’s going to be a good experience. Reset and work towards something new. This helps you set goals and gives you a target to work towards.

“Although I think of myself as fit and athletic, I definitely don’t think of myself as a runner so if I can give it a go, anyone can,” she says.

The Running Truth2:12

Run Melbourne presented by lululemon will take place on Sunday 30 July and is expected to attract 20,000 participants across three events: a Half-Marathon, a 10km run and a 5km run.